Evaporator.



L. M. & McK. JENNINGS. EVAPORATOR.

APPLIOATION FILE'D MAR. 12, 1914.

1, 1 26,7 67.. Patented Feb. 2, 1915.

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L M. & MGK. JENNINGS.

EVAPORATOR.

APPLIGATION FILED MAR.12, 1914. 1,126,767. Patented Feb. 2, 1915.

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LUTHER M. JENNINGS AND MGKINLEY JENNINGS, 0]? STAR, VIRGINIA.

EVAPORATOR.

Specification of Letters Patent.

Patented Feb. 2, 1915.

Application filed March 12, 1914. Serial No. 824,286.

To all whom it may concern Be it known that we, LUTHER M. JEN- nnvos and McKinney Jnnmxos, citizens of the United States, residing at Star, in the county of Carroll and tat-ate of Virginia, have invented certain new and useful Improvements in Evaporators, of which the following is a specification.

This invention relates to evaporators, and more particularly to an evaporator for use in the treatment of saccharine uices.

It is one aim of the present invention to provide an evaporator 'which may be adjusted in accordance with the quantity of juice being treated, the condition of the fire in the furnace, and the quality of the juices.

The primary aim of the invention is to provide an evaporator so constructed that scum from the heated juices will be caused to collect quickly at the surface and to move continuously toward one end of the pan of the evaporator, where it is automatically removed. Incidentally, the invention aims to so relatively arrange the walls of the evaporator pan that the scum will be directed toward the center of the pan and will not be permitted to collect upon the walls.

Another aim of the invention is to so arrange the evaporator pan with respect to the furnace that the pan and its scum discharging end will be kept relatively cool so as to further assist in the rapid and complete removal of the scum.

1n the accompanying drawings: Figure 1 is a side elevation of the evaporator embodying the present invention. Fig. 2 is a vertical longitudinal sectional View therethrough. Fig. 3 is a top plan view of the evaporator. Fig. 4: is a vertical transverse sectional view on the line 44 of Fig. 3.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters.

The furnace and pan of the evaporator are supported upon a base frame having sides 1 and a rear connecting portion 2, the sides 1 adjacent the forward end of the frame being extended inwardly toward each other as at 3 and uniting to form a standard 4 provided with a bifurcated head 5, in which is mounted the adjusting screw of the device, as will be presently explained. The furnace is supported between frames 6 which are approximately triangular and which have rel-1- tively inclined lower portions 7 wh ch meet below the rear end of the fire box of the furnace and are pivoted, as at 8, at their point of juncture, to the side members 1 of the base frame. The frames (3 are in this manner mounted for tilting movement. The frames 6 are provided with a forward extension 9, terminating in a yoke 10 which straddles the standard 4 in the manner shown in Figs. 1 and 2 of the drawings. The adjusting screw, above referred to, is indicated by the numeral 11, and is adjusably threaded through a block 12 mounted for turning movement, upon trunnions 13 in the head 5. The lower end of the screw 11 has a ball. and a socket connection 14- with the yoke 10, and the screw is provided at its upper end with a crank handle 15 by means of which it may be rotated, whereby to rock the frames 6 upon their pivots 8 so as to suitably adjust the frame. It will be understood, of course, that inasmuch as the block 12 is permitted to turn or rock upon its trunnions 13, the screw 11 will not bind as it is rotated to adjust the furnace supporting frames.

The furnace includes a ire box having side walls 16, and an open front 18 closed by a door 19. The door 19 is mounted in a frame 20 which supports the forward ends of a number of grate bars 21, these bars being further supported between their ends, and at their rear ends by means of substantially U-shaped frames 22 having their side portions secured to the sides of the fire box. At its rear end the fire box is in communication with a smoke chamber having side walls 23 and a bottom wall 24, and the said the box and smoke chamber are mounted between the frames (3 and secured in any suitable manner to the bars comprising these frames. The smoke chamber at its rear end communicates with a smoke stack 25.

The pan of the evaporator includes a bottom 26, side walls 27, a rear wall 28, and a forward wall 29, and in order that the said pan may be conveniently handled, it is provided upon each of its side walls with relatively long handle bars 30 which project at their forward and rear ends beyond the corresponding ends of the said pan and are extended transversely to form handle bars 31 spaced from the said ends of the pan. By reference to Figs. 1 and 2 of the drawings, it will be observed that the rear wall 28 of the evaporator pan is inclined upwardly and forwardly, and by reference to Figs. 8 and 4, it will be apparent that the side walls 27 of the pan are inclined upwardly and inwardly toward each other, the

forward wall 29 being preferably vertically disposed. The purpose of inclining the walls 27 and 28 will be presently pointed out in the description of the use of the evaporator. By reference to Figs. 1 and 2 it will be observed that the pan is disposed upon the furnace with its bottom 26 resting upon the top of the fire box 16 and the top of the smoke chamber 23, the forward end of the pan projecting a greater or less distance forwardly beyond the corresponding end of the tire box. As a consequence of this arrangement of the pan upon the furnace, the forward end of the pan will not be heated to any considerable degree, and, as a result, the scum from the heated juices will tend to collect at this end of the pan. By referenceto Fig. 2 it will be observed that the forward portion of the bottom wall 26 of the evaporator pan is curved upwardly and forwardly as at 32, and that the upper edge of its said portion is spaced rearwardly from the front wall 29 of the said pan. A scum receiving trough 33 is secured at one side to the upper edge of the portion 32 of the bottom of the pan, and at its other side to the said wall 29, this trough being substantially U-shape in cross section and extending transversely beneath the space between the portion 32 of the bottom wall of the pan and the said wall 29 and having its bottom, of course, located below the upper edge of the said portion 32. The trough projects at one end, as at 3 1, beyond one side ofthe pan and at its said end is closed, as indicated at 35. The opposite end of the trough is open and projects as at 36 beyond the other side of the pan.

In operation, a fire is built in the furnace and the juices to be treated are introduced into the evaporator pan, the angular position of the pan'being adjusted to suit the quantity of juices introduced into the pan, and this adjustment being accomplished by rotating the crank handle 15. As the juices.

boil, upwardly and inwardly flowing currents will be produced in the liquid, due to the relative inclination of the side walls of the pan and, consequently, the scum, as it forms, is carried to the center of the surface of the liquid. In a like manner, a for wardly flowing surface current is produced in the liquid, due to the inclination of the rear wall 28 of the pan and, therefore, as the scum accumulates, it is carried forwardly, flowing over the upper edge of the portion 32 of the bottom of the pan and into the trough 33, from which it may be flushed or washed by pouring water into the end of the said trough.

From the foregoing, it will be apparent that due to the relative inclination of the walls of the pan, the scum, as it is formed, is carried forward to'the scum discharging end of the pan, and, as the liquid at this end of the pan is much cooler than that within the pan above the tire box and smoke chamber, there will be an absence of the ebullition going on in the rear portion of the pan, and, therefore, the scum as it accumulates upon the surface of the liquid at the front of the pan, will not'be disturbed but will flow steadily into the'trough Concentrated uices or syrup are drawn off through an outlet pipe 87 fitted in one of the side walls of the pan near the bottom thereof and at the rear end of the pan.

Having thus described the invention, What is claimed as new is:

1. In an evaporator, a pan having a scum discharge end, and means for creating surface currents in liquid in the pan flowing toward the said end of the pan.

2. In an evaporator, a pan having at one side an overflow for scum, and means for creating surface currents in liquid in the pan flowing from the other side of the pan toward the said overflow.

8. In an evaporator, a pan having'a scum overflow at one end, the pan including side walls inclined upwardly toward each other and an end wall inclined upwardly and toward the said overflow end of the pan.

4. In an evaporator, a pan having its bottom spaced at one end from the corresponding end wall of the pan and directed upwardly into the pan, and an overflow trough disposed at its upper side within the space between the said end of the bottom of the pan and the lower edge of the said end wall of the pan and'projecting at both ends beyond the sides of the pan, the upper edge of the upwardly directed end of the bottom being located below the upper edges of the sides of the pan.

I 5. In an evaporator, a pan having its bottom spaced at one end from the corresponding end wall of the pan and directed upwardly into the pan, and an overflow trough disposed at its upper side within the space between the said end of the bottom of the pan and the lower edge of the said end wall of the pan and projecting at its ends beyond the sides of the pan, the trough having one end closed and its other end open and having its bottom inclined downwardly from its open to its closed end.

In testimony whereof we affix our signatures in presence of two witnesses.

LUTHER M. JENNINGS. tn. s] MCKINLEY JENNINGS.

--Copies of this patent may ,be obtained for five cents each. by addressing the Commissioner of Patents, Washington, D. C. 

